# US 2020/0403265 A1 · Composite electrode plate and battery cell using the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2020/0403265 A1
- Document ID: US20200403265A1
- Status: Published application
- Kind: A1
- Application number: 16/528,773
- Filed: 2019-08-01
- Published: 2020-12-24
- Earliest claimed: 2019-06-21
- Assignees: Ningde Amperex Technology Limited
- Applicants: Ningde Amperex Technology Ltd.
- Inventors: Yi-Bo Zhang; Li Xiang; Bin Wang; Qiaoshu Hu
- Web page: https://patentgrep.com/patent/US20200403265A1

## CPC

- H01M 4/667: {in the form of layers, e.g. coatings}
- H01M 10/052: Li-accumulators
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/1391: of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/1393: of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 4/66: Selection of materials
- H01M 4/661: {Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence)}
- H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes}
- H01M 10/0436: {Small-sized flat cells or batteries for portable equipment}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 50/483: Inorganic material
- H01M 50/486: Organic material
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A composite electrode plate of increased robustness and with better electrical properties for incorporation in a battery cell includes a composite current collector, a positive active material layer, a negative active material layer, a first isolation layer, and a second isolation layer. The composite current collector is disposed between the positive active material layer and the negative active material layer. The first isolation layer connects to a surface of the positive active material layer away from the composite current collector. The second isolation layer connects to a surface of the negative active material layer away from the composite current collector.

## Claims

### Claim 1

A composite electrode plate comprising:
a composite current collector;
a positive active material layer;
a negative active material layer, the composite current collector being disposed between the positive active material layer and the negative active material layer;
a first isolation layer connected to a surface of the positive active material layer away from the composite current collector; and
a second isolation layer connected to a surface of the negative active material layer away from the composite current collector.

### Claim 2 (depends on 1)

The composite electrode plate of claim 1, wherein each of the first isolation layer and the second isolation layer comprises a porous layer.

### Claim 3 (depends on 1)

The composite electrode plate of claim 1, wherein the composite current collector comprises:
an insulating layer;
a first conductive layer; and
a second conductive layer, the insulating layer being disposed between the first conductive layer and the second conductive layer,
wherein the positive active material layer is connected to a surface of the first conductive layer away from the insulating layer, and the negative active material layer is connected to a surface of the second conductive layer away from the insulating layer.

### Claim 4 (depends on 1)

The composite electrode plate of claim 1, wherein at least one of the first isolation layer and the second isolation layer comprises an isolation portion and an extension portion, and the isolation portion corresponds to the positive active material layer or the negative active material layer; and the extension portion extends from edges of the isolation portion, and surrounds edges of at least one of the positive active material layer and the negative active material layer.

### Claim 5 (depends on 4)

The composite electrode plate of claim 4, wherein the extension portion further surrounds edges of the composite current collector.

### Claim 6 (depends on 2)

The composite electrode plate of claim 2, wherein the porous layer is made of a material selected from a group consisting of polyvinylidene difluoride, polyvinylidene fluoride, polyimide, polyamide, polyacrylonitrile, polyethylene glycol, polyphenylene oxide, polyoxyethylene, polyethylene oxide, poly propylene carbonate, polymethyl methacrylate, polyethylene terephthalate, poly(vinylidene difluoride-co-hexafluoropropylene), poly(vinylidene fluoride-hexafluoropropylene), poly(vinylidene difluoride-co-chlorotrifluoroethylene), and derivatives thereof.

### Claim 7 (depends on 2)

The composite electrode plate of claim 2, wherein at least one of the first isolation layer and the second isolation layer further comprises a protection layer, and the protection layer fills in pores of the porous layer.

### Claim 8 (depends on 7)

The composite electrode plate of claim 7, wherein the protection layer comprises inorganic material selected from a group consisting of oxide, hydroxide, lithium compound, and any combination thereof.

### Claim 9 (depends on 2)

The composite electrode plate of claim 2, wherein at least one of the first isolation layer and the second isolation layer further comprises a protection layer, and the protection layer is disposed on a surface of the porous layer away from the positive active material layer or the negative active material layer.

### Claim 10 (depends on 9)

The composite electrode plate of claim 9, wherein a thickness of the porosity layer is 1 micrometer to 20 micrometers, and a thickness of the protection layer is 0.1 micrometer to 20 micrometers.

### Claim 11

A battery cell comprising:
a composite electrode plate, the composite electrode plate wound or stacked to form the battery cell, the composite electrode plate comprising:
a composite current collector;
a positive active material layer;
a negative active material layer, the composite current collector being disposed between the positive active material layer and the negative active material layer;
a first isolation layer connected to a surface of the positive active material layer away from the composite current collector; and
a second isolation layer connected to a surface of the negative active material layer away from the composite current collector.

### Claim 12 (depends on 11)

The battery cell of claim 11, wherein each of the first isolation layer and the second isolation layer comprises a porous layer.

### Claim 13 (depends on 11)

The battery cell of claim 11, wherein the composite current collector comprises:
an insulating layer;
a first conductive layer; and
a second conductive layer, the insulating layer being disposed between the first conductive layer and the second conductive layer;
wherein the positive active material layer is connected to a surface of the first conductive layer away from the insulating layer, and the negative active material layer is connected to a surface of the second conductive layer away from the insulating layer.

### Claim 14 (depends on 11)

The battery cell of claim 11, wherein at least one of the first isolation layer and the second isolation layer comprises an isolation portion and an extension portion, the isolation portion corresponds to the positive active material layer or the negative active material layer, the extension portion extends from edges of the isolation portion, and surrounds edges of at least one of the positive active material layer and the negative active material layer.

### Claim 15 (depends on 14)

The battery cell of claim 14, wherein the extension portion further surrounds edges of the composite current collector.

### Claim 16 (depends on 12)

The battery cell of claim 12, wherein the porous layer is made of a material selected from a group consisting of polyvinylidene difluoride, polyvinylidene fluoride, polyimide, polyamide, polyacrylonitrile, polyethylene glycol, polyphenylene oxide, polyoxyethylene, polyethylene oxide, poly propylene carbonate, polymethyl methacrylate, polyethylene terephthalate, poly(vinylidene difluoride-co-hexafluoropropylene), poly(vinylidene fluoride-hexafluoropropylene), poly(vinylidene difluoride-co-chlorotrifluoroethylene), and derivatives thereof.

### Claim 17 (depends on 12)

The battery cell of claim 12, wherein at least one of the first isolation layer and the second isolation layer further comprises a protection layer, and the protection layer fills in pores of the porous layer.

### Claim 18 (depends on 17)

The battery cell of claim 17, wherein the protection layer comprises inorganic material selected from a group consisting of oxide, hydroxide, lithium compound, and any combination thereof.

### Claim 19 (depends on 12)

The battery cell of claim 12, wherein at least one of the first isolation layer and the second isolation layer further comprises a protection layer, and the protection layer is disposed on a surface of the porous layer away from the positive active material layer or the negative active material layer.

### Claim 20 (depends on 19)

The battery cell of claim 19, wherein a thickness of the porosity layer is 1 micrometer to 20 micrometers, and a thickness of the protection layer is 0.1 micrometer to 20 micrometers.